A zoom lens includes a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, which are arranged in order from the object side to the image side. The zoom lens performs zooming by changing a distance between the lens units. The first lens unit includes a compound optical element including a lens element and a resin layer having optical characteristics different from optical characteristics of the lens element, the resin layer being laminated on the lens element. An Abbe number .nu.dg of a material of the lens element, an Abbe number .nu.dj of a material of the resin layer, and an anomalous partial dispersion ratio .DELTA..theta.gFj of the material of the resin layer are adequately set.